Share Email Facebook Twitter LinkedIn To Delete a UCS Definition 2013-04-10 Product Documentation Intermediate View Original Click View tabCoordinates panelNamed UCS.At the Command prompt, enter ucsman. In the UCS dialog box, Named UCSs tab, select the UCS definition you want to delete. Press Delete. You cannot delete the current UCS or a UCS with the default name UNNAMED. Related References Commands for the User Coordinate System (UCS) Related Concepts About Using Named UCS Definitions and Preset Orientations